I have not spent much time in this part of the code, but I believe you
are on the right track. You probably already know some of these things,
but I suggest the following.
1) Create a test that can simulate the 3-4 month issue more quickly.
Many board, many reboots?
2) Test code that has all debug enabled, with some added debug around
the area of the URB error.
3) Walk through the code and try to determine what possible reasons
could cause this URB error. Is it a dynamic allocation? If so, try to
determine what your memory situation is at that point.
4) Try reducing the kernel memory to see if it is more frequent. Try
increasing to see if it goes away.
Steve
On 06/04/2010 03:16 PM, Alok Kumar wrote:
Correction Error number is -110 (timeout)
*From:* Alok Kumar
*Sent:* Friday, June 04, 2010 4:25 PM
*To:* '[email protected]'
*Subject:* usb 1-1: device descriptor read/64, error -11
Hi,
I am using Davinci 6446 with git tree kernel 2.6.30. We use USB drive
(pen drive) to collect the data periodically.
Sometimes (once in 3-4 months) , after reboot an earlier working USB
drive is not recognized (no /dev/sda1 etc) and I see following errors
and USB is was not detected.
*kernel: usb 1-1: new high speed USB device using musb_hdrc and address 2*
*kernel: Initializing USB Mass Storage driver...*
*kernel: usbcore: registered new interface driver usb-storage*
*kernel: USB Mass Storage support registered.*
*kernel: musb_h_ep0_irq 1067: no URB for end 0*
*kernel: usb 1-1: device descriptor read/64, error -110*
* *
I see some comments in musb/musb_host.c for 'no URB for end 0', saying
this should never happen.
My question is how to fix this error. What kind of recovery mechanism
, I can put to auto detect it and fix it.
Any help will be greatly appreciated.
Thanks
Alok
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